Reactor vessel



FIG. 1 is a front perspective view of a reactor vessel according to the present invention;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line showing of a reactor vessel represents unclaimed subject matter and forms no part of the claimed design. 

CLAIM I claim the ornamental design for a reactor vessel, as shown and described. 